South Africa’s former president, Jacob Zuma turned himself in to the police early Thursday morning to begin serving a prison sentence for contempt of court.

Prison authorities confirmed that Zuma “has been admitted to start serving a 15 months sentence at Estcourt Correctional Centre” in his home province of KwaZulu-Natal.

Zuma’s imprisonment comes after a week of rising tensions over his sentence.

Zuma, 79, was ordered to prison for contempt because he defied a court order for him to testify before a judicial commission investigating widespread allegations of corruption during his time as the country’s president, from 2009 to 2018.

The Constitutional Court ordered that if Zuma did not voluntarily hand himself over to the police then the police should arrest the country’s former president by the end of the day Wednesday.

In a last-minute plea to avoid going to prison, Zuma’s lawyers had written to the acting chief justice requesting that his arrest be suspended until Friday, when a regional court is to rule on his application to postpone the arrest.

Zuma’s lawyers asked the acting chief justice to issue directives stopping the police from arresting him, claiming there would be a “prejudice to his life.”

Zuma had also launched two court proceedings to avoid arrest after his sentence last week.

He applied to the Constitutional Court to rescind his sentence and that application will be heard on July 12.

This is the first time a former president has been jailed in post-apartheid South Africa. The case has also set a benchmark for the continent, by jailing a former head of state for refusing to respond to a corruption probe.